The AT64F was made form 1981 to December of 1987 at the Ogden UT plant. They were based on the Exton built A64F ( A model, 6x4, Forward Front Axle). The cab was stamped out by Mayflower, and there are a lot of common parts available through Western Star. That cab is their Heritage series. The trucks were equipped with Caterpillar diesel engines with an output from 325 to 450 hp. The maximum speed is up to 72 kph.